NOAO >   Observing Info >   Approved Programs >   2008A-0332

Small NOAO Logo

Proposal Information for 2008A-0332


PI: Jillian Bornak, New Mexico State University, jbornak@nmsu.edu
Address: Astronomy Department, Box 30001/MSC4500, Las Cruces, NM 88003, USA

CoI: Bernard McNamara, New Mexico State University
CoI: Thomas Harrison, New Mexico State University

Title: Quantifying the Variabilities and Periodicities of Synchrotron Jets in X- Ray Binaries

Abstract: Spitzer observations have discovered or confirmed the presence of synchrotron jets in X-ray binaries (XRBs) containing both neutron stars and black holes. Understanding the origin, total power, and duty cycle of this emission is important for understanding the accretion process in XRBs and, by extension, jet processes in other sources. We propose to reobserve the XRB GX 17+2 during bright time windows in June or July when its entire IR cycle can be measured. This will allow us to determine the jet opening angle. We observed this source using the 2.1 m last season but only caught its brightening phase. There are a number of other XRBs (e.g., GRS1915+105) that have highly variable near- infrared emission, but these objects have never been adequately monitored to measure the amplitude and duty cycles of their variations. During the non-outburst nights for GX 17+2, we will monitor three other XRBs with known synchrotron emission to create near-infrared light curves. We request 9 nights with SQIID on the 2.1 m.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2008A-0332

noaoprop-help@noao.edu

Small NOAO Logo